When did momondo last update prices for flights from Helena Airport to London?

Prices for flights from Helena Airport to London were last updated today.

How old do you have to be to fly from Helena Airport to London?

The minimum age a child must be to fly alone is five but airlines that offer an unaccompanied minor (UNMR) service will have their own age restrictions, including rules around flight length, timings, and stopovers. We always recommend checking with the individual airline you are booking with to travel from Helena Airport to London.

What documentation or ID do you need to fly to London?

The necessary travel and health documents for your London trip may vary depending on your travel plans and individual circumstances. Generally, you should have various documents, such as a national ID card or driver's license and a passport that is valid for six months beyond your scheduled arrival date. We recommend seeking advice from your airline or a trusted third party, such as IATA.

$463 Cheap Flights from Helena to London in 2026

Find the cheapest flights from Helena to London

Round-trip

One-way

Cheap round-trip flights

Enter your travel dates to find the best prices.

6:28 am - 9:40 amHLN Helena-LHR London Heathrow

20h 12m1 stop Denver Intl

7:30 am - 8:59 pmLHR London Heathrow-HLN Helena

20h 29m2 stops Frankfurt am Main Denver Intl

$888United Airlines

Sun, Nov 15 - Wed, Dec 9

6:28 am - 7:10 amHLN Helena-LHR London Heathrow

17h 42m2 stops Denver Intl Montreal Pierre Elliott Trudeau Intl

7:30 am - 8:59 pmLHR London Heathrow-HLN Helena

20h 29m2 stops Frankfurt am Main Denver Intl

$891United Airlines

Sun, Nov 15 - Wed, Dec 9

2:30 pm - 9:20 pmHLN Helena-LHR London Heathrow

23h 50m2 stops Denver Intl Newark

7:30 am - 8:59 pmLHR London Heathrow-HLN Helena

20h 29m2 stops Frankfurt am Main Denver Intl

$892United Airlines

Sat, Dec 5 - Wed, Dec 9

4:08 pm - 12:20 pmHLN Helena-LHR London Heathrow

13h 12m1 stop Seattle/Tacoma Intl

2:45 pm - 3:31 pmLHR London Heathrow-HLN Helena

31h 46m1 stop Seattle/Tacoma Intl

$893Alaska Airlines

Wed, Jan 6 - Tue, Jan 12

7:00 am - 9:40 amHLN Helena-LHR London Heathrow

19h 40m1 stop Denver Intl

3:00 pm - 1:27 pmLHR London Heathrow-HLN Helena

29h 27m2 stops Toronto Pearson Intl Denver Intl

$900United Airlines

Wed, Jan 6 - Tue, Jan 12

7:00 am - 9:10 amHLN Helena-LHR London Heathrow

19h 10m2 stops Denver Intl Newark

11:10 am - 8:59 pmLHR London Heathrow-HLN Helena

40h 49m2 stops Toronto Pearson Intl Denver Intl

$904United Airlines

Wed, Jan 6 - Wed, Jan 13

7:00 am - 6:30 amHLN Helena-LHR London Heathrow

16h 30m2 stops Denver Intl Toronto Pearson Intl

3:00 pm - 8:59 pmLHR London Heathrow-HLN Helena

36h 59m2 stops Toronto Pearson Intl Denver Intl

$908United Airlines

Wed, Jan 6 - Tue, Jan 12

6:15 am - 9:40 amHLN Helena-LHR London Heathrow

20h 25m1 stop Denver Intl

9:00 am - 1:48 pmLHR London Heathrow-HLN Helena

35h 48m2 stops Munich Franz Josef Strauss Denver Intl

$912United Airlines

Mon, Sep 21 - Fri, Oct 9

6:15 am - 9:40 amHLN Helena-LHR London Heathrow

20h 25m1 stop Denver Intl

7:30 am - 9:18 pmLHR London Heathrow-HLN Helena

20h 48m2 stops Frankfurt am Main Denver Intl

$917United Airlines

Tue, Sep 22 - Wed, Oct 7

2:26 pm - 8:40 pmHLN Helena-LHR London Heathrow

23h 14m2 stops Denver Intl Newark

7:30 am - 9:18 pmLHR London Heathrow-HLN Helena

20h 48m2 stops Frankfurt am Main Denver Intl

$922United Airlines

Tue, Sep 22 - Wed, Oct 7

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United Airlines flights from Helena to London

Our best United Airlines deals on Helena to London flight tickets

United Airlines

Nov 15

HLN6:28 amHelena

20h 12m

1 stop

LHR9:40 amLondon Heathrow

Dec 9

LHR7:30 amLondon Heathrow

20h 29m

2 stops

HLN8:59 pmHelena

$888

United Airlines

Nov 15

HLN6:28 amHelena

17h 42m

2 stops

LHR7:10 amLondon Heathrow

Dec 9

LHR7:30 amLondon Heathrow

20h 29m

2 stops

HLN8:59 pmHelena

$891

United Airlines

Dec 5

HLN2:30 pmHelena

23h 50m

2 stops

LHR9:20 pmLondon Heathrow

Dec 9

LHR7:30 amLondon Heathrow

20h 29m

2 stops

HLN8:59 pmHelena

$892

Alaska Airlines flights from Helena to London

Our best Alaska Airlines deals on Helena to London flight tickets

Alaska Airlines

Jan 6

HLN4:08 pmHelena

13h 12m

1 stop

LHR12:20 pmLondon Heathrow

Jan 12

LHR2:45 pmLondon Heathrow

31h 46m

1 stop

HLN3:31 pmHelena

$893

Alaska Airlines

Dec 5

HLN4:08 pmHelena

13h 12m

1 stop

LHR12:20 pmLondon Heathrow

Dec 9

LHR2:45 pmLondon Heathrow

31h 46m

1 stop

HLN3:31 pmHelena

$943

Alaska Airlines

Dec 5

HLN4:08 pmHelena

13h 12m

1 stop

LHR12:20 pmLondon Heathrow

Dec 9

LHR2:45 pmLondon Heathrow

31h 46m

1 stop

HLN3:31 pmHelena

$944

Fly from

Fly to

Route

Depart

Return

Price

Cheapest round-trip

HelenaLondon

HLN Helena - LHR London Heathrow

HLNLHR

Helena

Sun 11/15

6:28 am-9:40 am

1 stop20h 12m

London Heathrow

Wed 12/9

7:30 am-8:59 pm

2 stops20h 29m

$888

Quickest round-trip

HelenaLondon

HLN Helena - LHR London Heathrow

HLNLHR

Helena

Sun 11/15

6:28 am-7:10 am

2 stops17h 42m

London Heathrow

Wed 12/9

7:30 am-8:59 pm

2 stops20h 29m

$891

HelenaLondon

HLN Helena - LHR London Heathrow

HLNLHR

Helena

Sat 12/5

2:30 pm-9:20 pm

2 stops23h 50m

London Heathrow

Wed 12/9

7:30 am-8:59 pm

2 stops20h 29m

$892

HelenaLondon

HLN Helena - LHR London Heathrow

HLNLHR

Helena

Wed 1/6

4:08 pm-12:20 pm

1 stop13h 12m

London Heathrow

Tue 1/12

2:45 pm-3:31 pm

1 stop31h 46m

$893

HelenaLondon

HLN Helena - LHR London Heathrow

HLNLHR

Helena

Wed 1/6

7:00 am-9:40 am

1 stop19h 40m

London Heathrow

Tue 1/12

3:00 pm-1:27 pm

2 stops29h 27m

$900

HelenaLondon

HLN Helena - LHR London Heathrow

HLNLHR

Helena

Wed 1/6

7:00 am-9:10 am

2 stops19h 10m

London Heathrow

Wed 1/13

11:10 am-8:59 pm

2 stops40h 49m

$904

HelenaLondon

HLN Helena - LHR London Heathrow

HLNLHR

Helena

Wed 1/6

7:00 am-6:30 am

2 stops16h 30m

London Heathrow

Tue 1/12

3:00 pm-8:59 pm

2 stops36h 59m

$908

HelenaLondon

HLN Helena - LHR London Heathrow

HLNLHR

Helena

Mon 9/21

6:15 am-9:40 am

1 stop20h 25m

London Heathrow

Fri 10/9

9:00 am-1:48 pm

2 stops35h 48m

$912

HelenaLondon

HLN Helena - LHR London Heathrow

HLNLHR

Helena

Tue 9/22

6:15 am-9:40 am

1 stop20h 25m

London Heathrow

Wed 10/7

7:30 am-9:18 pm

2 stops20h 48m

$917

HelenaLondon

HLN Helena - LHR London Heathrow

HLNLHR

Helena

Tue 9/22

2:26 pm-8:40 pm

2 stops23h 14m

London Heathrow

Wed 10/7

7:30 am-9:18 pm

2 stops20h 48m

$922

Flights are sorted by cheapest round-trip flights first.

Showing 1-10 of 20 resultsSorted by cheapest first

How to get the cheapest flight ticket from Helena to London

Look no further. We've gone through all the searches for this route on momondo so you have the important information and insights to find the cheapest flight ticket for your trip

What is the cheapest airline that flies from Helena to London?

United Airlines and Delta are the most popular carriers operating from Helena to London

When to book flights from Helena to London

Are you open to changing your travel dates? Check out the ideal times to fly from Helena to London according to our flight data. Find out which month and days have the cheapest flights.

Estimated round-trip price

Cheap Helena to London (HLN to LON) flight deals and tips

Find info about flight duration, direct flights, and airports for your flight from Helena to London

Fastest flight time	20h 12m
Direct flights	None

The fastest flight from Helena to London takes 20h 12m

There are no direct flights from Helena to London. There are no popular flight routes from Helena to London.

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Frequently asked questions about flying from Helena to London

How far is Helena to London by plane?
Helena and London are 4547.6 mi apart from one another. In terms of flight time, this usually takes a little over 20h 12m.
When did momondo last update prices for flights from Helena Airport to London?
Prices for flights from Helena Airport to London were last updated today.
How old do you have to be to fly from Helena Airport to London?
The minimum age a child must be to fly alone is five but airlines that offer an unaccompanied minor (UNMR) service will have their own age restrictions, including rules around flight length, timings, and stopovers. We always recommend checking with the individual airline you are booking with to travel from Helena Airport to London.
What documentation or ID do you need to fly to London?
The necessary travel and health documents for your London trip may vary depending on your travel plans and individual circumstances. Generally, you should have various documents, such as a national ID card or driver's license and a passport that is valid for six months beyond your scheduled arrival date. We recommend seeking advice from your airline or a trusted third party, such as IATA.

Hounslow

Gatwick

Milton Keynes

Luton

Hayes

Wembley

Croydon

Dover

Stansted

Richmond

Kingston upon Thames

Harrow

Watford

Cobham

Slough

Uxbridge

Worthing

Romford

Ilford

Bedford

Why use momondo?

Why should I use momondo to find a flight deal from Helena to London?

momondo compares prices from hundreds of airlines and agents so you can find and book the best deal on flights from Helena to London. Millions of users trust and use momondo every year so you are in good hands.

Can I find flights from Helena to London with flexible booking policies on momondo?

Yes. All flights to London from Helena on momondo can be compared and filtered by various policies on offer, including flexible booking.

How can momondo help me find flights from Helena to London?

momondo offers useful filters to help you find the right flight. Choose specific flight times, airports or even what payment method you prefer. We have numerous options to help you book your ideal flight from Helena to London.

I’m not ready to book a flight from Helena to London right now. Can momondo alert me if prices change?

If you are simply researching potential flights to London, momondo offers a useful price alert feature which will track prices for flights to London from Helena and alert you when they change.

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Cheap flights from Helena to London from $463

This is the cheapest one-way flight price found by a momondo user in the last 72 hours by searching for a flight from Helena to London departing on 9/6. Fares may change, and may not be available for all flights or travel dates. Click the price to refresh the search for this deal.

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United Airlines flights from Helena to London

Our best United Airlines deals on Helena to London flight tickets

Alaska Airlines flights from Helena to London

Our best Alaska Airlines deals on Helena to London flight tickets

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How to get the cheapest flight ticket from Helena to London

What is the cheapest airline that flies from Helena to London?

When to book flights from Helena to London

Cheap Helena to London (HLN to LON) flight deals and tips

Fastest flight time

Direct flights

Frequently asked questions about flying from Helena to London

Traveling to a place near London?

Why use momondo?

An easier way to manage your London trip

We make it super easy to schedule, organize and travel with friends or family. Trips is free — and available to use no matter where you book.

Get notified when prices go down

Daily price changes in your inbox - only with Price Alerts.

Find better results for your trip to the United Kingdom

Fly into one of these airports located in London

Airports listed have a maximum distance of 35.6 mi from London

Fly your favorite airline to London

Airlines are sorted and displayed according to clicks in the past 7 days on momondo

Cabin classes currently available on flights to London

List of cabin classes available on flights landing in London. Availability may vary depending on flight origin and airline.

Popular cities in the United Kingdom

Popular flights according to clicks in the last 7 days on momondo

Fly to other destinations from Helena

According to popular flight searches on momondo this year

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According to popular flight searches on momondo this year